Fuse-terminal packing



A. L. EUSTICE.

Fusi TERMINAL PACKING.

APPLICATION FILED AUG- 9. i919.

1 ,436,797. Patented Nov. 28, 1922..

Patented Nov. 28, 1922.

UNITED STATES 1,436,797 PATENT OFFICE.

ALFRED L. EUS'IIICE, 0F CHICAGO, ILLINOIS.

FUSE-TERMINAL PACKING.

Original application filed Iarch 31, 1919, Serial 110,286,446. Divided and this application led August 9, 1919. Serial No. 316,415.

To all whom t may concern:

Be it known that I, ALFRED L. EUs'rIon, a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois, have invented certain new and ,useful Improvements in Fuse-Terminal Packings, of which the following is a specification.

This is a division of application Serial No. 286,446, filed March 31st, 1919, in which is described and broadly claimed a fuse terminal attaching means comprising a disk attached to a terminal to provide a fixed abutment thereon, and to serve as a means for centering the terminal in the shell; while an anchoring member overlying the end of the shell, held thereon by the cap or ferrule, and interlocking with the shell against rotation, carries a pair of locking members which conform to the section of and embrace the terminal between the fixed abutment and shoulders thereof, but which is readily releasable therefrom to facilitate assembly of the connected fuse and terminal with the shell; the fixed abutment in that instance also serving as a gas check on the under side of the anchoring member.

The present invention embodies the features above described, but provides means for making a more effective gas check, and to this end a movable packing disk is located between the fixed abutment and the anchoring member, fits snugly around the terminal, and is pressed by a spring against the under side of the anchoring member in a manner to check the escape of gas past the latter; the preferred construction of this organization of elements being made to embody the additional features of having the locking members of the anchoring member intersected with the terminal so as to find their fixed abutments thereon, and having the packing disk spring intersectthe terminal in a diametric position relatively to the packing disk.

The present invention will be fully understood upon reference to the yaccompanying drawing, in which- Figures 1 and 2 are axial sectional views in planes at right angles to each other, showing the preferred construction of a fuse embodying the features of the present invent-ion.

Figure 3 is a section on the line 3*--3 of Figure l, and

Figures 4 and 5 are, respectively, an under face view and an edge view of the anchoring dlsk with its locking members in releasing position. f

1 represents a shell, which is preferably bushed at its ends by metal liners 2, threaded into the shell at 2*L and having external threads 2b that receive the securing ferrules 3. 4 represents the terminal, which in the present illustrative embodiment is a socalled knife blade terminal; but it is to be understood that, as a securing and as check means, the features of the present invention will be applicable to a terminal which serves only to hold the fusible link within the shell, and to electrically connect the same with the ferrule 3, if it should be desired to use the latter as the means of electrically introducing the fuse into the circuit. Terminal 4 carries a fixed abutment 5, which is preferably in the form of a circular disk which may be made to substantially fit within the bushing 2 and thereby center the terminal and its fusible link within the shell. The fixed abutment is preferably secured permanently to the terminal 4, as, for instance, by striking up the metal, as indicated at 5X.

The means for holding the terminal against longitudinal and rotary motion on the shell comprises an anchoring disk 6 slotted to fit the section of the terminal 4, and of such diameter that it will fit over the end of the shell and be clamped thereon by the ferrule 3, and which carries lugs or projections 7 that enter notches 8 in the liner of lthe shell, so that when it `is so clamped in position, it will be adapted to hold the terminal against rotation in addition to holding it longitudinally.

The anchoring member 6 is further provided with means for releasably interlocking it with the terminal 4, which interlocking means preferably also serves to render the anchorin means, in its relation to the terminal an fixed abutment, sufliciently gas-tight to prevent longitudinal discharge of gas incident to blowing of the fuse.

The interlocking means carried b the disk 6is in the form of a divided dis the members 9 of which, pivoted upon the pintles 7, are recessed on their meeting edges to conform to the reduced section 5a of the terminal blade 4, and also to provide ton ues 9a* that meet within a slot 4b of the termmal 4i. By this means the anchoring :member finds its inner fixed abutment by direct engagement with the terminal, and to that extent is somewhat similar in principle to the construction shown in application Serial No. 241,115; and the outer lamina 5*" ot the 'fixed -abutment disk 5, in order that it may serve as a gas check, iits snugly around t-he blade 4 and is pressed against the locking member 9a by means of a spring 11 introduced between it and the fixed locking disk. Both theinner fixed member 5 and the packing disk LX assume the relation of ya means for centering the terminal in the shell. rlhe projections drop into recesses in the end or' the shell to hold the anchoring 'member 6 against rotation, and the member 6, being iirmly gripped upon the terminal 4E, is

adapted to hold lthe latter against rotation; and When the anchoring member is clamped upon the end of the shell, it is adapted to hold the parts against longitudinal displacement. "f

lt will be seen `that the internal iian'ge ot the terrule 3 overlaps the anchoring member 6 so as to effectively check the'escap'eo'f gas around the outer edge of the anchoring member, to compel the Agas to escape by Way of the circuitous passage afforded by the threads.v y

It is to benoted that the iixedjabutment 5 provides a limiting stop for the inward movement ot vthe gas check 5, and thatthis lined abutment, being located in close proximity to the bearing of the spring 11, also sustains thelatter against bending inward beyond its elastic limit when the check is depressed to admit the interlocking members 9a to the reduced section 5a ofthe terminal.

lf claim:

1. In a fuse, a shell,v a terminal entering vrotary movement thereof, and 'a pac-king disk mounted upon the terminal on the inner side oi' the anchoring member and having means for pressing it against the latter to check the flow of gas longitudinally past the saine.

2. In a fuse, a shell, a terminal entering said shell, an anchoring member engaging the terminal to resist both longitudinal and rotary movement thereof, a packing disk movably mounted upon the terminal Within the shell, and a spring pressing ysaid ypacking disk against the inner tace of the vanchoring member.

3. .ln a fuse, a shell, a terminal kentering said shell, an anchoring member engaging the terminal to resist both longitudinal ifieeyei' and rotary movement thereof, a packing disk Inova-bly mounted upon the terminal Within the shell, and a spring pressing said packing disk against the inner tace of the anchoring member; said spring being supported by the terminal.

4. 'In a fuse, a shell, a terminal entering said shell, an anchoring member engaging the terminal to resist both longitudinal and rotary movement thereof, a packing disk mo'vably mounted upon the terminal Within the shell, anda spring pressing said pack- 'ing disk against the inner face of the anchoring member; said spring being extended through the terminal in diametric relation tothe packing disk.

5. In a fuse, a shell, a terminal entering said shell, an anchoring member engaging the terminal to resist both longitudinal and rotary movement thereof, a pack-ing disk movably mounted upon the terminal Within the shell, anda spring pressing said packing disk against the inner faceot the anchoring member; said packing disk being adapted to center the terminal in the shell.

6. ln a fuse, a shell, a terminal ente-ring said shell, an anchoring member engaging the terminal to resist both longitudinal and rotary movement thereof, a packing disk movably mounted upon the terminal Within the shell, a spring pressing said packing disk against the inner tace of the anchoring member, and a fixed abutment disk mounted on the terminal on the opposite side oi the spring from thelpacking disk.

7. In a fuse, a shell, a 'terminal entering said shell, an anchoring member engaging the terminal to resist both longitudinal and rotary movement thereof, a packing disk movably mounted upon the terminal Within the shell, a spring pressing said packing disk against the inner tace oit the anchoring member, and a :fixed abutment disk mounted on the terminal on the opposite side of the ,spring from the packing disk; said fixed abutment disk being adapted to ycenter the terminal in the shell.

8. In a use, a shell, a terminal entering said shell, an anchoring member interlocked with the terminal against both. longitudinal and rotary movement, means securing the anchoring member upon the end oi'the shell, andv a packing disk having means for pressing it against the inner face oi `the anchoring member; the fixing of said anchoring member relatively to the terminal in the longitudinal direction being independent oi" the packing disk.

lSigned at Chicago, Illinois, this p 30th day ot July, 1919.

ALFRED L. viiUsricr, 

